EOS C70 XF-AVC No audio in Premiere Pro 25.6.3, audio OK on camera playback

[David_Swinehart]

I have also posted this in the Adobe PrP forums, but reposting here in case anyone on the Canon side has any advice... 

I have an audio issue that is baffling me; perhaps someone else has encountered it and knows what's at play.

I recently shot a multicam project where the A-Cam was my Canon C70, shooting in XF-AVC, YCC422 10-bit 4K. System frequency was 59.94 Hz, audio was set to LPCM, 24-bit, 48kHz, which gives 4-channels of audio, though active audio was only passing to channels 1-2 (ch 3-4 were recording dead air). TC was fed via BNC on the A-Cam (i.e. we were not striping an audio channel with TC).  The B-cam was an R50v, also in XF-AVC YCC422 10-bit, with TC striped to audio track 1 via a Tentacle Sync-E.

At the conclusion of shooting, we checked playback of each camera for audio and video playback; all was good. We also previewed the files using Canon's XF Utility on the laptop; again all was good.

When bringing the files into Premiere Pro and preparing the multicam sequence, there is NO audio showing for any channel of the C70 footage! I have tried the Audio Channels / Interpret Footage; tried transcoding the footage using Media Encoder - using both ProRes and MXF Op1, transferring multiple ways - both direct from the card and using the XF Utility - all with the same results.

I went back to the XF Utility and checked the file, and the playback is perfect. Audio is clear on ch 1-2 and shows in the meters, but disappears when imported into Premiere.

To solve the issue for today, I was able to import the clip into Tentacle Sync's timecode tool and export an audio-only track with timecode embedded into it, then sync that back with my multicam sequence. This takes substantial time and is not feasible to perform on every project (but will get me out of a jamb today).

Any thoughts on what might have caused this to occur? Any particular settings that could be out of whack that could cause something like this?

Canon C70, ver 1.1.0.1

System info - Intel Core i7 evo, Win11 Pro, 32GB RAM, NVidia RTX 4050

Premiere Pro 25.6.3 / Build 2

[Hazel_T]

Hi David_Swinehart,

I understand your concern with audio not importing into your NLE. Through Canon support we only have information on the products and services offered directly through Canon, so we do not have information on what may be needed to get the audio into Premiere Pro.

Since the audio is playing back correctly on the camera that indicates the camera recorded the audio correctly, and since it is playing back in the XF Utility that indicates the audio portion of the file did import correctly to your computer. As far as camera settings go there aren't any that would be specific to something like Premiere Pro. One thing to double check is that when you import the XF file into Premiere Pro you are importing the entire folder structure of the file. Sometimes if part of the folder structure of the file is missing it could cause issues with the file. Since you are able to pull the audio in other programs though that does not seem to be what is happening in this case.

[David_Swinehart]

Thank you, Hazel. I ended up getting an email back from Adobe, and it appears that all current versions of Premiere Pro v 25.6.x have a bug that prevents proper import of Canon XF-AVC footage, no matter the method. We were advised to roll back to 25.5 until Adobe fixes the issue. This was not unique to C70 files; it affects all XF-AVC imports.